'Allerton, IL' definitions:

Allerton, IL -- U.S. village in Illinois

From: Gazetteer 2000
Name :
Allerton, IL -- U.S. village in Illinois
Population (2000) :
293
Housing Units (2000) :
122
Land area (2000) :
0.644832 sq. miles (1.670107 sq. km)
Water area (2000) :
0.000000 sq. miles (0.000000 sq. km)
Total area (2000) :
0.644832 sq. miles (1.670107 sq. km)
FIPS code :
00880
Located within :
Illinois (IL), FIPS 17
Location :
39.912859 N, 87.935636 W
ZIP Codes (1990) :
61810
Note :
some ZIP codes may be omitted esp. for suburbs.